The data adds to signs that climate change is fostering a sense of so-called "flying shame" that’s causing some people to avoid one of the most polluting forms of travel. Significantly more people are taking the train on trips within Europe that are less four hours.
The travel industry keeps growing. There were an estimated 1.3 billion international arrivals in 2017 and that will only increase as more people view travel as a right, rather than a luxury.
The tank of a Boeing 747 holds over 200,000 liters (52,000 gallons) of kerosene when full — about as much fuel as 4,000 small cars.
